Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil
ABSTRACT: Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ mo...
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Sociedade Brasileira de Ciência do Solo
2018-12-01
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doaj-47cfbfe01d4b4133894a09d18108f9da2021-01-02T09:11:12ZengSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo1806-96572018-12-0143010.1590/18069657rbcs20180010S0100-06832019000100501Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, BrazilEliana de SouzaLucas Machado PontesElpídio Inácio Fernandes FilhoCarlos Ernesto Goncalves Reynaud SchaeferEliana Elizabet dos SantosABSTRACT: Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ model was applied to calculate the water balance over a period of two years (2007-2009). Evapotranspiration, runoff, and potential groundwater recharge (PGR) were calculated, using daily data on rainfall, potential evapotranspiration, and plant-available water. A soil survey was undertaken for all major soils occurring in the basin. Soils samples were used to determine hydraulic conductivity, bulk density, and water content at field capacity and at the permanent wilting point. Vegetation data were obtained from the literature and used to determine the following parameters: canopy interception, crop coefficient, and root depth. The estimated groundwater was spatially predicted using the Random Forests model with digital elevation, vegetation index, pedological, lithological, and climate maps. During the two years, an average of 32 % of rainfall was converted to groundwater. Annually, the percent of rainwater converted to groundwater varied between 27 and 48 % for all soil classes, highlighting the great temporal variability. The spatial prediction showed a volume of approximately 17,484 and 35,410 m3 of rainfall being converted to groundwater for the first and second year, respectively. The BALSEQ model showed a feasibility for the water balance calculation and can be reapplied for updating the groundwater maps of the Doce River Basin. These maps could then be used to guide land use planning programs, with the aim to protect water resources.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100501&lng=en&tlng=enaquiferinfiltrationpotential rechargeRandom Forests Modelwater balance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eliana de Souza Lucas Machado Pontes Elpídio Inácio Fernandes Filho Carlos Ernesto Goncalves Reynaud Schaefer Eliana Elizabet dos Santos |
spellingShingle |
Eliana de Souza Lucas Machado Pontes Elpídio Inácio Fernandes Filho Carlos Ernesto Goncalves Reynaud Schaefer Eliana Elizabet dos Santos Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil Revista Brasileira de Ciência do Solo aquifer infiltration potential recharge Random Forests Model water balance |
author_facet |
Eliana de Souza Lucas Machado Pontes Elpídio Inácio Fernandes Filho Carlos Ernesto Goncalves Reynaud Schaefer Eliana Elizabet dos Santos |
author_sort |
Eliana de Souza |
title |
Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil |
title_short |
Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil |
title_full |
Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil |
title_fullStr |
Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil |
title_full_unstemmed |
Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil |
title_sort |
spatial and temporal potential groundwater recharge: the case of the doce river basin, brazil |
publisher |
Sociedade Brasileira de Ciência do Solo |
series |
Revista Brasileira de Ciência do Solo |
issn |
1806-9657 |
publishDate |
2018-12-01 |
description |
ABSTRACT: Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ model was applied to calculate the water balance over a period of two years (2007-2009). Evapotranspiration, runoff, and potential groundwater recharge (PGR) were calculated, using daily data on rainfall, potential evapotranspiration, and plant-available water. A soil survey was undertaken for all major soils occurring in the basin. Soils samples were used to determine hydraulic conductivity, bulk density, and water content at field capacity and at the permanent wilting point. Vegetation data were obtained from the literature and used to determine the following parameters: canopy interception, crop coefficient, and root depth. The estimated groundwater was spatially predicted using the Random Forests model with digital elevation, vegetation index, pedological, lithological, and climate maps. During the two years, an average of 32 % of rainfall was converted to groundwater. Annually, the percent of rainwater converted to groundwater varied between 27 and 48 % for all soil classes, highlighting the great temporal variability. The spatial prediction showed a volume of approximately 17,484 and 35,410 m3 of rainfall being converted to groundwater for the first and second year, respectively. The BALSEQ model showed a feasibility for the water balance calculation and can be reapplied for updating the groundwater maps of the Doce River Basin. These maps could then be used to guide land use planning programs, with the aim to protect water resources. |
topic |
aquifer infiltration potential recharge Random Forests Model water balance |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100501&lng=en&tlng=en |
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